Common bleeding disorders affecting individuals with Hereditary Hemorrhagic Telangiectasia

Area of Science:

• Vascular Medicine
• Hematology
• Genetics

Background:

• Hereditary Hemorrhagic Telangiectasia (HHT) is a genetic disorder affecting blood vessels, impacting multiple organ systems.
• Complications from bleeding and shunts in HHT significantly increase healthcare utilization, particularly in the lungs and liver.
• HHT patients are prone to chronic bleeding and life-threatening events from arteriovenous malformations.

Purpose of the Study:

• To determine the prevalence of co-occurring bleeding disorders in adult patients with HHT.
• To assess the clinical implications of a secondary bleeding disorder in HHT management.

Main Methods:

• A retrospective study was conducted at a single HHT center.
• Blood tests for specific coagulation factors (Factor VIII, Ristocetin Cofactor, Factor IX, Factor XI) were analyzed in adult HHT patients.

Main Results:

• Two out of 77 HHT individuals (2.6%) were diagnosed with a bleeding disorder based on laboratory results.
• Four individuals showed below-normal levels for von Willebrand Factor, Ristocetin Cofactor, or Factor VIII.

Conclusions:

• The presence of a secondary bleeding disorder in HHT patients has significant clinical implications.
• Establishing screening protocols for bleeding disorders in HHT centers is vital for managing bleeding symptoms and optimizing patient care.
• This study emphasizes the need to review and update best practice protocols for HHT patient management.